Wasn't the recent Supreme court opinion on international law split? I believe our conservative judges were quite vocal in their opposition. Some day we'll have a consensus on just how big of a mistake that was. You are absolutely correct to denounce it as a grave error.
The last I recall reading was that 7 of 9 judges agreed that in certain circumstances 'international law' should be considered.
We're too close to losing America for my comfort. Having a law which orders the legislators and the Courts to follow the Constitution is the best answer I can think of.
It will protect the Bill of Rights and everything else.